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Finding the Fourth Proportional to 815,801.88, 1,223,876.16 and 342,214.32

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Solution

The fourth proportional to 815,801.88, 1,223,876.16 and 342,214.32 is: 513,394.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,801.88 : 1,223,876.16 = 342,214.32 : x
  2. Step 2: Convert to fraction form
    815,801.88/1,223,876.16 = 342,214.32/x
  3. Step 3: Cross multiply
    815,801.88x = 1,223,876.16 × 342,214.32
  4. Step 4: Simplify right side
    815,801.88x = 418,827,947,858.61
  5. Step 5: Solve for x
    x = 418,827,947,858.61/815,801.88
  6. Step 6: Final answer
    x = 513,394.19

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.